Screamin FC

. My factory one broke from the previous owner and i had this one laying around. i have everything wired in to be installed(gauge in place, power/ground wired, shift light.) i just need to know where to wire the last green wire to. alot of places have said to the trailing ignition coil......i have no idea which one this is, ive only been playing with rx7's now for about 2 months, my first one was a non running 12a sa22c, this one is an 86 base model. and help would be greatly appreciated. and once again. I am new to the rotary thing....pics/advice would be great. thanks

misterstyx69

iTrader: (142)

What gauge though????What does the gauge do?

RotaryRocket88

iTrader: (7)

^ Might be useful. I'm guessing tach.

Also needed: all information on whatever aftermarket brand/model gauge this is. What is the green wire? Tach signal wire?

Screamin FC

wow....im sorry about the lack of information. yes, it is the tachometer. the guage is made by auto meter. and the green wire is the tach signal wire. once again...sorry about the lack of info

misterstyx69

iTrader: (142)

The trailing coil near the Firewall has a single wire with bullet connector that has the Tach signal.Yellow with a stripe?.(****!..brain fart..yellow with green?..)
It's the only wire that is alone anyways.
You may also have a single wire bullet connector at the Leading too(depending on Coil,some had them).Tach signal too.
Remember to set your tach to receive the proper input.
try 6 cyl.

gerald m

yup the green wire on mine I hooked to the - side of the leading coil because I don't have trailing . it also has a 2-4-6- cyl setting mine needed to be on 4 to work proper. white goes to the light sw. ,orange + battery,red to on side of ign. black goes to Grnd. worked good .

Screamin FC

i actually dont think my tach has a setting but it came off a 13b and ive seen it functioning properly in that car. so it should work fine on mine. ill let you guys know when/if i got it to work

Screamin FC

ok. so i connected the tach to said bullet connector. and it seems that the tach is only getting half the correct rpm reading. i tried unplugging the connector next to where the bullet connector was, whatever it was was giving the factory tach power. i tried unplugging that thinking if i only had power going to the aftermarket tach it might receive full power, now neither of them work though(but somehow my factory "shift up" light still works)and i plugged that connector back up and my main tach is now receiving correct rpms, but my aftermarket one is only getting walf, and thats pretty constant through the rpm range(idle@1100<main>/idle@500~550<aftermarket>)

gerald m

I would suggest you get in touch with the guy you bought said tach from and see if he had some kind of inline system to make it work proper did you try it directly to the - side of a coil to see what happens ?? You might need to remove the tach cover to set the proper pickup setting . ask him . The trailing coil by the way is the coil serving the trailing spark plugs .the Top plugs T for trailing== lower plugs L for leading , If it is a proper tach for a rotary it really should work on either T or L coil